i bought 4 pieces 1GB DDR 400 PC3200 in the begging i thought it was defective no boot at all, after i notice that the two modules was different from the other two, the type of chip was KingMax and looks like it was used... the stickers with any info for the module, was unstuck,,peeled off the module...so i remove these two and the other two works fine,after i test the other two KingMax alone ,the modules boot in 266 mhz mode ! it is not 400mhz no PC3200, (that is why the stickers was unstuck,,peeled